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Set Theory, Logic, Probability, Statistics

- Fundamentals: Set theory, logic and proofs. Probability and statistics
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Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:25 AM
1 27,684
I hope someone can help me prove one of De Morgan's Law: (A intersection B)' = A' U B'
Aug27-11 08:43 PM
14 129,085
Suppose we have a directed acyclic graph. The nodes are labeled with integers (which may be negative). Imagine that...
Aug25-11 12:30 AM
3 1,495
Koosis: Statistics..., 4th ed., p. 177: The given answer is yes. "You must be prepared to assumed the...
Aug17-11 07:00 PM
Stephen Tashi
3 2,226
How do we formalize the following: For all natural Nos : n^2 is even\Rightarrow n is even
Aug19-11 09:48 PM
5 1,731
Consider a probability space (\Theta, \Sigma_\Theta, P_\Theta), where P_\Theta is a probability measure on the...
Aug19-11 01:43 AM
11 2,614
Hi everybody, I was wondering this: "What is the probability, given all the information (including scientific...
Aug18-11 09:35 PM
2 1,380
I'm not a mathematician, but I want to understand how a mathematician would view this issue. I'm working primarily...
Aug18-11 09:03 AM
1 1,027
I've tried to understand Johansen test, but I don't understand it.
Aug18-11 10:46 AM
0 829
Hi, Just wanted to ask a question regarding existence and uniqueness of solutions to SDEs. Say you have shown...
Aug18-11 09:50 AM
0 964
I think that I have figured out a way to beat the game of roulette with simple probability and a very useful...
Aug21-11 02:03 PM
3 1,616
Consider a statement A: Negation of A (~A) is true Then, ~A: Negation of A is false If A is true, that...
Aug19-11 08:08 AM
1 877
Hello everyone (first post here :)), I have a question regarding Probability. I calculated the distribution of a...
Aug19-11 07:39 PM
Stephen Tashi
6 1,924
I want to know what is the meaning of percentile. what is the percentile : 23.79 means? Please give me explanation...
Aug19-11 12:26 PM
1 2,566
When we refer to terms in an equation, what EXACTLY are we referring to? Suppose for example we have: ab + bc + cd...
Aug22-11 02:42 PM
4 1,990
Hello, I have sample of ~280 measurements. Some are replicates and some are not. I want to remove the...
Aug24-11 09:35 PM
Stephen Tashi
1 1,650
I need to find the formula involving \neg, \wedge or \vee for the following truth table with the variables P and Q: ...
Aug20-11 07:41 PM
1 1,897
Suppose you have a set of digits, for the sake of simplicity we'll make them binary, how would you determine the...
Aug21-11 07:39 PM
3 2,209
The Markov chain, as you know, is a sequence of random variables with the property that any two terms of the sequence...
Aug21-11 06:50 PM
1 763
Hi everyone! I have a question on how to compare two distributions. I'm currently a 2nd year biology grad student,...
Aug23-11 12:22 AM
Stephen Tashi
12 4,823
Dear everyone, consider a function f(x) of a random variable x with average m and probability distribution p(x). ...
Aug23-11 02:30 PM
2 1,172
I've never been exposed to this axiom schemata of replacement before, so here's my understanding of it: the axiom...
Aug23-11 03:30 PM
1 987
I was reading this up on Wiki so I'll just give a quick overview and then ask my question. Let \cal{S} be an...
Aug25-11 11:16 PM
2 1,173
Being a hobbiest programmer, I know enough about probability to get by. However, I've set myself an impossible (for...
Aug27-11 06:14 AM
4 1,329
Hi, For a measurement set-up I'm designing, I have to position two sensors which have to be placed at an angle...
Aug24-11 09:48 AM
Stephen Tashi
1 899
The two events A and B have probabilities 0.2 and 0.4. Also P(A intersect B) = 0.08. (a) Are the two events A and...
Aug26-11 05:00 AM
SW VandeCarr
1 1,423
Along 14 separate sections of highway measurements of trac volume (x) and rate of accidents (y) were taken. x;...
Aug26-11 09:51 AM
Stephen Tashi
4 2,245
- Sanders: Statistics: A First Course, 5th ed., ß 7.2, p. 236. Why? The data has not been changed. What difference...
Aug28-11 02:02 PM
Stephen Tashi
14 2,583
What is the difference between sigma algebra and topological space topological space?also what is the meaning of...
Aug25-11 09:52 AM
2 2,115
Firstly, I would like to say that I am an applied physics major, so my knowledge on probability not relating to...
Aug25-11 04:35 PM
2 750
Does anyone happen to know what the cardinality of the set of ordinal number (transfinite and otherwise) is? A...
Aug27-11 09:06 AM
4 1,952
From Koosis, I pieced together the following algorithm. Is sigma known? Yes? Then calculate the exact confidence...
Aug27-11 03:35 PM
I like Serena
1 1,188
Hi. I have a proof of a very basic measure theory theorem related to the definition of a measure, and would like to...
Aug26-11 02:15 PM
4 1,474
Hello! I need your help. Iím really terrible at statistics, probability, permutations, and combinations. Iíve looked...
Aug27-11 06:21 PM
6 2,024
Hi By some googling it seems like there exist some kind of expansion of the Taylor series for statistical...
Aug26-11 03:57 PM
Stephen Tashi
1 1,402
I need to verify this identity: (A\B)\DeltaC = (A\DeltaC)\Delta(A\bigcapB) (with delta standing for the...
Aug27-11 07:19 PM
3 983
Hi everyone, This is not a homework question. I just want to understand an aspect of linear regression better. ...
Aug27-11 11:50 PM
Stephen Tashi
3 2,307
I am working with some wind speed data and need to work out the standard deviation of the magnitude of the horizontal...
Aug30-11 03:47 PM
Stephen Tashi
5 2,543
Hi all I'm having a bit of trouble trying to calculate the Upper and Lower Control Limit on R chart. The file...
Aug28-11 11:42 PM
0 759
So I took probability last year, and for one of my classes we have an optional refresher worksheet, but I cannot...
Aug29-11 10:53 PM
I like Serena
1 1,055
I read about the differences between Ipv4 and Ipv6, regarding address size. Ipv4 = address size of 32 bits Ipv6 =...
Aug30-11 05:15 AM
1 1,363

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